firebase-js-sdk/docs-devsite/performance.firebaseperformance.md

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# FirebasePerformance interface
The Firebase Performance Monitoring service interface.

<b>Signature:</b>

```typescript
export interface FirebasePerformance 
```

## Properties

|  Property | Type | Description |
|  --- | --- | --- |
|  [app](./performance.firebaseperformance.md#firebaseperformanceapp) | [FirebaseApp](./app.firebaseapp.md#firebaseapp_interface) | The [FirebaseApp](./app.firebaseapp.md#firebaseapp_interface) this <code>FirebasePerformance</code> instance is associated with. |
|  [dataCollectionEnabled](./performance.firebaseperformance.md#firebaseperformancedatacollectionenabled) | boolean | Controls the logging of custom traces. |
|  [instrumentationEnabled](./performance.firebaseperformance.md#firebaseperformanceinstrumentationenabled) | boolean | Controls the logging of automatic traces and HTTP/S network monitoring. |

## FirebasePerformance.app

The [FirebaseApp](./app.firebaseapp.md#firebaseapp_interface) this `FirebasePerformance` instance is associated with.

<b>Signature:</b>

```typescript
app: FirebaseApp;
```

## FirebasePerformance.dataCollectionEnabled

Controls the logging of custom traces.

<b>Signature:</b>

```typescript
dataCollectionEnabled: boolean;
```

## FirebasePerformance.instrumentationEnabled

Controls the logging of automatic traces and HTTP/S network monitoring.

<b>Signature:</b>

```typescript
instrumentationEnabled: boolean;
```